The objective of the research reported in this thesis was to develop a technique to monitor the dynamics of sediments and nutrients entering the coastal ocean with river plumes associated with high intensity low frequency events (e.g. floods), using ocean colour remote sensing. The data collected included conductivity-temperature-depth (CTD) profiles as well as Nephelometer and secchi disk measurements.
During the 7-20 February 2004 field trip to Lucinda Jetty a number of sediment-related measurements were undertaken to study flood-induced suspended sediment transport in the Herbert River mouth and adjacent coastal waters. The data collected included vertical profiles of turbidity, conductivity-temperature-depth and secchi disk depth.
University of Sydney
In-situ profiling of turbidity was measured by an Analite NEP160 turbidity meter provided by Dr Charles Lemckert (Griffith University, Australia). As the instrument is submerged into the water sample a beam of light scattered within a broad angle centred on 90 deg. is measured by a photomultiplier. The turbidity of the sample is then estimated in nephelometric turbidity units (NTU) relative to standard solutions. One NTU equals 1 g/m3.
Secchi disc depth measurements are visibility measurements which give an approximation of light attenuation estimates in the water column.
Analite NEP160 Turbidity Meter.